28255824 has 40 divisors (see below), whose sum is σ = 81105920. Its totient is φ = 9418464.

The previous prime is 28255807. The next prime is 28255841. The reversal of 28255824 is 42855282.

28255824 is a `hidden beast` number, since 2 + 82 + 558 + 24 = 666.

It is an interprime number because it is at equal distance from previous prime (28255807) and next prime (28255841).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32272 + ... + 33135.

It is an arithmetic number, because the mean of its divisors is an integer number (2027648).

Almost surely, 2^28255824 is an apocalyptic number.

28255824 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28255824 is an abundant number, since it is smaller than the sum of its proper divisors (52850096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28255824 is a wasteful number, since it uses less digits than its factorization.

28255824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65424 (or 65412 counting only the distinct ones).

The product of its digits is 51200, while the sum is 36.

The square root of 28255824 is about 5315.6207539666. The cubic root of 28255824 is about 304.5808952970.

It can be divided in two parts, 2825 and 5824, that added together give a square (8649 = 93²).

The spelling of 28255824 in words is "twenty-eight million, two hundred fifty-five thousand, eight hundred twenty-four".